Mortise and marking gage



(No Model.)

`L.1LPY1\ITE1\I. MORTISE AND MARKING GAGE.

No'. 586,393. Patented July 1-3, 1897.A

dwf/J UNTTED STATES PATENT OFFICE.

LARS H. PYNTEN, OF BALTIC, SOUTH DAKOTA.

MORTISE AND MARKING GAGE.

SPECIFICATION forming part of Letters Patent No. 586,393, dated July 13,1897.

Application filed July 15, 1896. Serial No. 599,257. (No model.)

To coll whom, it 77u07] concern:

Be it known that I, LABS H. PYNTEN, a citizen of the United States,residing at Baltic, in the county of Minnehaha and State of SouthDakota, have invented a new and useful Mortise and Marking Gage, ofwhich the following is a specification.

This invention relates to a new and useful mortise and marking gage, andhas for its object to provide a device of this description by means ofwhich the guide-lines for the mortise or tenon may be inscribed and themarking-points of which may be adjusted with reference to an auger-bit,so as to transfer its exact width to the material to be operated upon.

In some gages of ordinary construction the outside lines only are markedand the distance between the same is determined by measuring with arule, and in practice it is next to impossible to lay out lines by thismethod sufficiently accurate to permit the workman to bore a hole thefull width of the mortise to be formed, thus necessitating considerablechiseling, which requires both time and skill, and as no central line isprovided which is accurate relative to the side lines it is a matter ofguesswork to place the screw of the auger in the exact center of theside lines, but by the use of my improvement not only are the side linesinscribed at the exact width apart of the diameter of the auger, but thecentral line is also inscribed at the same time, which facilitates theplacing of the starting-screw of the auger in its proper relativeposition to the side lines, and this is accomplished mechanicallywithout calculation or measurement by the operator.

Vith these ends in view this invention consists in the details ofconstruction and combination of elements hereinafter set forth,and thenspecifically designated by the claims.

In order that those skilled in the art to which this inventionappertains may understand how to make and use the same, its constructionand operation will now be described in detail, referring to theaccompanying drawings, forming a part of this specification, in which- YFigure lis a side view of my improvement, showing it in operation; Fig.2, a perspective thereof, illustrating its construction; Fig.

3, a detailed view of the three markers used in my improvement; Fig. 4,a section through the gage-block, illustrating the method of holdingsaid block in its adjusted position; and Fig. 5 a diagrammatical view ofthe inscribed lines and auger placed in relation thereto, illustratingthe manner of centering said auger by said lines.

Referring to the drawings indetail, A and B represent the two endblocks, in which are secured the guide-rods O, which are four in number,and j ournaled within the end blocks is a screw-rod D, which is providedwith a thumb-knob E, by which said rod may be turned upon its axis ineither direction for the purpose hereinafter set forth.

The rod D is provided with right-handed threads F and left-handedthreads G, between which is a blank portion H, and the firstnamedthreads pass through the threaded hub of the marking-disk I, and threadsG likewise pass through the threaded hub of the marking-disk J, so thatwhen the rod D is revolved, as before described, these markingdisks willbe moved to and from each other, as the case may be and as is wellunderstood in the use of right and left handed screws.

The marking disks have holes formed therethrough for the passage of theguiderods O, by which arrangement said disks are prevented from turningupon their axes and guided in their longitudinal movement. A stationarydisk K is secured upon the guiderods and has a central openingtherethrough for the passage of the screw-rod and this disk is solocated that the blank portion H of the screw-rod lies within itscentral opening.

The gage-block L is provided with holes for the free passage of theguide-rods C, and also a central hole M of sufficient diameter to permitthe passage of the screw-rod D, and in order that this block may be heldin any adjustment upon the guide-rods a set-screw N is threadedtherethrough, so that its end may bear against two of said guide-rods,and this screw is provided with a knurled head O to facilitate itsoperation. From this it willbe seen that the gage-block may be adjustedand held in yany adjustment for the guidance of the marking-disksrelative to the edges of the material to be operated upon, as shown inFig. l.' The marking-disk lhas two flattened ICO sections P, and thedisk K one of such section Q, while the periphery of the disk J is acomplete circle, so that when it is desired to inscribe only one linethe device may be so turned as to cause the flattened portion Q of thedisk K and one of the flattened portions P of the disk I to lie next thesurface to be marked, thus cutting out the action of the disks I and K,but permitting the disk J to perform its function, and when it isdesired to inscribe two lines the gage may be so turned as to cause one.of the flattened portions P of the disk I to lie neXt the su rfaee tobe operated upon, while the marking edges of the disks J and K arepermitted to act upon saidsurface. j

A gage built in accordance with my improvement has many advantages,among which is the fact that it can be set by placing the marking-disksin conjunction with the auger or other boring-tools and operating therod D, so as to bring said markers into alinement with the outer edgesof said auger after the manner of gaging the diameter of a tool, whenlines may be inscribed upon the surface to be operated upon, which willdetermine the width of the hole to be bored, and at the same time thecentral marker will inscribe a line midway between the two sidelines,and this central line is of use in locating the auger, since thestarting-bit of said auger may be placed thereon, and again when thegage has once been set for'the mortise it may also be used for outliningthe tenon, and the two will therefore exactly correspond, thus greatlyreducing the time heretofore spent in laying out this class of work,aswell as increasing` the accuracy of the completed work. Anotheradvantage of this arrangement is that when a tapering tenon is to beproduced the central line inscribed by the marker K may be utilized todetermine the pitch of the side lines relative thereto, thereby securingthe saine angle of taper upon both sides of the tenon,

In practice a gage built in accordance with my improvement operates moresmoothly and accurately on account of the three markers acting at onetime upon the surface of the wood, thereby overcoming the tendency ofthe grain to throw the marker out of line, since i the three markerswill not at one time fall upon grains of the same irregularity.

In assembling myimprovem ent the markers are first screwed on the rod D,then the guiderods passed through the holes in the markers, then themovable head L put on the rods, and, lastly, the blocks A and B are puton said rods and there held by clenching the ends of said rods, theblocks being countersunk to facilitate this operation.

The rod D is provided with a washer at either end thereof outside of theblocks A and B in order that it may be held against longitudinalmovement within said blocks, the

knob E being the last piece secured in place.

In practice I have found that a gage built in accordance with myimprovement maybe operated in half the time required for accomplishingthe same work with other gages.

Having thus/fully described my invention, what I claim as new and usefulis- 1. Amortise and marking gage, consisting of guide-rods, end blocksto which said rods are secured, a screw-rod journaled within the endblocks, said rod having right and left handed threads formed thereon,adjustable marking-disks of different shapes adapted to slide upon theguide-rods and be actuated by the screw-rod, andlastationary,marking-disk located equidistant from the rst named disks,as specified. i

2. In a mortise and marking gage, a series of guide-rods, end blocks towhich said guiderods are secured, a gage-block arranged to slide uponthe guide-rods, a set-screw forholding said block in its adjustedposition, a screwrod journaled within the end blocks, said rod havingright and left handed threads formed thereon, the disks I and J adaptedto slide upon the guiderods, said disks having internally-threaded hubsfor engagement with the threads upon the screw-rod, and a stationarymarking-disk secured upon the guide-rods equidistant from the disks Iand J, said disks being of different shapes substantially as and for thepurpose set forth.

3. In a gage of the character described, a series of guide-rods, endblocks for holding said rods parallel with each other, a threaded rod Djournaled within the end blocks, right and left handed threads F and Gformed upon said rod, marking-disks I and J, each having aninternally-threaded hub adapted to receive one set of the threads, adisk K secured upon the guide-rods midway between the disks I and J,said disks being of different shapes, a knob E for operating the rod D,a gage-block adapted to slide upon the guide-rods, and a setscrew N forholding said block in any adjustment, substantially as shown anddescribed.

4. In combination with the guide-rods of gages of the characterdescribed, the disks I, J and K arranged upon said rods, the disk Ihaving two flattened portions, and the disk K one ilattened portion,substantially as and for the purpose set forth.

5. A gage having scratch-points composed of three disks slidablethereon, the first of said disks having two flattened portionsin itsper-` 'imeter and the second having one flattened portion in itsperimeter registering with one of the flattened portions of the firstdisk, substantially as described.

In testimony whereof I have hereunto affixed my signature in thepresence of two subv scribing witnesses.

LARS II. PYNTEN.

IVitnesses: y

EDWARD NELSON, T. J. QUEsToEL.

IOO-

